def test_signed_tx_1_input_2_outputs(self):
tx = Transaction([self.txin], [self.txout, self.change_txout])
sig = self.sk.sign_input(
tx, 0,
Script([
'OP_DUP', 'OP_HASH160',
self.from_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
]))
pk = self.sk.get_public_key().to_hex()
self.txin.script_sig = Script([sig, pk])
self.assertEqual(tx.serialize(), self.core_tx_signed_result)
def test_signed_low_s_SIGNONE_tx_1_input_2_outputs(self):
tx = Transaction([self.txin], [self.txout, self.change_low_s_txout])
sig = self.sk.sign_input( tx, 0, Script(['OP_DUP', 'OP_HASH160',
self.from_addr.to_hash160(),
'OP_EQUALVERIFY', 'OP_CHECKSIG']),
SIGHASH_NONE)
pk = self.sk.get_public_key().to_hex()
self.txin.script_sig = Script([sig, pk])
# check correct raw tx
self.assertEqual(tx.serialize(),
self.core_tx_signed_low_s_SIGNONE_result)
# check correct calculation of txid
self.assertEqual(tx.get_txid(), self.core_tx_signed_low_s_SIGNONE_txid)
def test_p2pkh_and_p2wpkh_to_p2pkh(self):
tx = Transaction([self.txin_spend_p2pkh, self.txin_spend_p2wpkh], [self.txout3], has_segwit=True,witnesses = [])
# spend_p2pkh
sig1 = self.sk.sign_input(tx, 0, self.p2pkh_addr.to_script_pub_key())
pk1 = self.sk.get_public_key().to_hex()
self.txin_spend_p2pkh.script_sig = Script([sig1, pk1])
tx.witnesses.append(Script([]))
# spend_p2wpkh
sig2 = self.sk.sign_segwit_input(tx, 1, self.p2pkh_redeem_script, self.txin_spend_p2wpkh_amount)
pk2 = self.sk.get_public_key().to_hex()
tx.witnesses.append(Script([sig2, pk2]))
self.assertEqual(tx.serialize(), self.p2pkh_and_p2wpkh_to_p2pkh_result)
def main():
# always remember to setup the network
setup('testnet')
# send 2 P2PKH inputs to 1 P2WPKH output
# create transaction inputs from tx ids of UTXOs (contained 0.002 tBTC)
txin = TxInput('eddfaa3d5a1c9a2a2961638aa4e28871b09ed9620f9077482248f368d46d8205', 1)
txin2 = TxInput('cf4b2987c06b9dd2ba6770af31a4942a4ea3e7194c0d64e8699e9fda03f50551', 1)
# create transaction output using P2WPKH scriptPubKey (locking script)
addr = P2wpkhAddress('tb1qlffsz7cgzmyzhklleu97afru7vwjytux4z4zsl')
txout = TxOutput(to_satoshis(0.0019), addr.to_script_pub_key())
#txout = TxOutput(to_satoshis(0.0019), Script([0, addr.to_hash()]) )
# create transaction from inputs/outputs -- default locktime is used
# note that this is not a segwit transaction since we don't spend segwit
tx = Transaction([txin, txin2], [txout]) #, has_segwit=True)
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private keys corresponding to the address that contains the
# UTXOs we are trying to spend to sign the input
sk = PrivateKey('cTALNpTpRbbxTCJ2A5Vq88UxT44w1PE2cYqiB3n4hRvzyCev1Wwo')
sk2 = PrivateKey('cVf3kGh6552jU2rLaKwXTKq5APHPoZqCP4GQzQirWGHFoHQ9rEVt')
# note that we pass the scriptPubkey as one of the inputs of sign_input
# because it is used to replace the scriptSig of the UTXO we are trying to
# spend when creating the transaction digest
from_addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
sig = sk.sign_input( tx, 0, Script(['OP_DUP', 'OP_HASH160',
from_addr.to_hash160(), 'OP_EQUALVERIFY',
'OP_CHECKSIG']) )
from_addr2 = P2pkhAddress('mmYNBho9BWQB2dSniP1NJvnPoj5EVWw89w')
sig2 = sk2.sign_input( tx, 1, from_addr2.to_script_pub_key() )
# get public key as hex
pk = sk.get_public_key().to_hex()
pk2 = sk2.get_public_key().to_hex()
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, pk])
txin2.script_sig = Script([sig2, pk2])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
def create_HODL_address(key, lock, is_priv=False):
setup(os.getenv("BUY_LAMBO_BTC_NET", "regtest"))
# Get public key (given or found from private key)
public_key = PrivateKey(key).get_public_key() if is_priv else PublicKey(key)
# Get address from public key
address_from_key = public_key.get_address()
# Set lock sequence prefix
seq = Sequence(TYPE_ABSOLUTE_TIMELOCK, lock)
# create the redeem script - needed to sign the transaction
redeem_script = Script(
[
seq.for_script(),
"OP_CHECKLOCKTIMEVERIFY",
"OP_DROP",
"OP_DUP",
"OP_HASH160",
address_from_key.to_hash160(),
"OP_EQUALVERIFY",
"OP_CHECKSIG",
]
)
# create a P2SH address from a redeem script
addr = P2shAddress.from_script(redeem_script)
print("Time-locked address: {}".format(addr.to_string()))
def getTxStateLockScript(T: int, delta: int, pubkey_pay_right: PublicKey,
pubkey_mulsig_left: PublicKey, pubkey_mulsig_right: PublicKey) -> Script:
"""
tx_state lock script encodes possibilities to either refund locked coins to left or pay to right
:param T: locked funds can pe paid after this time wherever right user wants
:param delta: upper bound on time for transaction to be confirmed by the network
:param pubkey_pay_right: public key owned by right user for payment after time T
:param pubkey_mulsig_left: public key owned by left user for refund if enable-refund tx is published
:param pubkey_mulsig_right: public key owned by right user for refund if enable-refund tx is published
:return: tx_state lock script
"""
# signature script:
# - for refund (with enable-refund tx + ∆): "OP_0 <left_signature> <right_signature>"
# - for payment (time() >= T): "<signature_right> <pubkey_right> OP_0 OP_0 OP_0 OP_0 OP_0 OP_0"
lock_script = Script([
'OP_2', pubkey_mulsig_left.to_hex(), pubkey_mulsig_right.to_hex(), 'OP_2', 'OP_CHECKMULTISIG',
'OP_IF',
delta, 'OP_CHECKSEQUENCEVERIFY', 'OP_DROP', 'OP_TRUE', # check if refund and lock for ∆
'OP_ELSE',
T, 'OP_CHECKLOCKTIMEVERIFY', 'OP_DROP', 'OP_DUP', 'OP_HASH160', pubkey_pay_right.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG', # check if payment
'OP_ENDIF'
])
return lock_script
def from_raw(txoutputraw,cursor=0,has_segwit=False):
"""
Imports a TxOutput from a Transaction's hexadecimal data
Attributes
----------
txinputraw : string (hex)
The hexadecimal raw string of the Transaction
cursor : int
The cursor of which the algorithm will start to read the data
has_segwit : boolean
Is the Tx Output segwit or not
"""
txoutputraw = to_bytes(txoutputraw)
# read the amount of the TxOutput
value = int.from_bytes(txoutputraw[cursor:cursor + 8][::-1], 'big')
cursor += 8
# read the size (bytes length) of the integer representing the size of the locking
# Script's raw data and the size of the locking Script's raw data
lock_script_size, size = vi_to_int(txoutputraw[cursor:cursor + 9])
cursor += size
lock_script = txoutputraw[cursor:cursor + lock_script_size]
cursor += lock_script_size
return TxOutput(amount=value,
script_pubkey=Script.from_raw(lock_script, has_segwit=has_segwit)),cursor
def from_raw(txinputraw, cursor=0, has_segwit=False):
"""
Imports a TxInput from a Transaction's hexadecimal data
Attributes
----------
txinputraw : string (hex)
The hexadecimal raw string of the Transaction
cursor : int
The cursor of which the algorithm will start to read the data
has_segwit : boolean
Is the Tx Input segwit or not
"""
txinputraw = to_bytes(txinputraw)
# read the 32 bytes of TxInput ID
inp_hash = txinputraw[cursor:cursor + 32][::-1]
if not len(inp_hash):
raise Exception("Input transaction hash not found. Probably malformed raw transaction")
output_n = txinputraw[cursor + 32:cursor + 36][::-1]
cursor += 36
# read the size (bytes length) of the integer representing the size of the Script's raw
# data and the size of the Script's raw data
unlocking_script_size, size = vi_to_int(txinputraw[cursor:cursor + 9])
cursor += size
unlocking_script = txinputraw[cursor:cursor + unlocking_script_size]
cursor += unlocking_script_size
sequence_number = txinputraw[cursor:cursor + 4]
cursor += 4
return TxInput(txid = inp_hash.hex(),
txout_index=int(output_n.hex(), 16),
script_sig=Script.from_raw(unlocking_script,has_segwit=has_segwit), sequence=sequence_number),cursor
def test_spend_p2sh_csv_p2pkh(self):
redeem_script = Script([
self.seq.for_script(), 'OP_CHECKSEQUENCEVERIFY', 'OP_DROP',
'OP_DUP', 'OP_HASH160',
self.sk_csv_p2pkh.get_public_key().to_hash160(), 'OP_EQUALVERIFY',
'OP_CHECKSIG'
])
txout = TxOutput(Decimal('11'), self.another_addr.to_script_pub_key())
tx = Transaction([self.txin_seq], [txout])
sig = self.sk_csv_p2pkh.sign_input(tx, 0, redeem_script)
self.txin_seq.script_sig = Script([
sig,
self.sk_csv_p2pkh.get_public_key().to_hex(),
redeem_script.to_hex()
])
self.assertEqual(tx.serialize(), self.spend_p2sh_csv_p2pkh_result)
def main():
# always remember to setup the network
setup('regtest')
#
# This script creates a P2SH address containing a
# CHECKLOCKTIMEVERIFY plus a P2PKH locking funds with a key
# until a certain block_height is reached
#
# set values
block_height = 140
seq = Sequence(TYPE_ABSOLUTE_TIMELOCK, block_height)
# secret key corresponding to the pubkey needed for the P2SH (P2PKH) transaction
p2pkh_sk = PrivateKey('cSbKZh6a6wNUAQ8pr2KLKeZCQ4eJnFmN35wtReaoU4kCP97XQu6W')
# get the address (from the public key)
p2pkh_addr = p2pkh_sk.get_public_key().get_address()
# create the redeem script
redeem_script = Script([seq.for_script(), 'OP_CHECKLOCKTIMEVERIFY', 'OP_DROP', 'OP_DUP', 'OP_HASH160', p2pkh_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'])
# create a P2SH address from a redeem script
addr = P2shAddress.from_script(redeem_script)
print(addr.to_string())
def main():
#Connect to the regtest
setup('regtest')
proxy = NodeProxy('user', 'bitcoin').get_proxy()
#Accept a Public Key from User and derive a P2PKH address from it
pk = PublicKey.from_hex(input('Please input your Public Key\n'))
pk_p2pkh_addr = pk.get_address()
#Accept future absolute block amount from User
current_blocks = proxy.getblockcount()
absolute_blocks = int(
input(
f'\nPlease input the future block height. The current block height is: {current_blocks}\n'
))
#Set the timelock sequence and create a redeemScript accordingly
redeem_script = Script([
absolute_blocks, 'OP_CHECKLOCKTIMEVERIFY', 'OP_DROP', 'OP_DUP',
'OP_HASH160',
pk_p2pkh_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
])
#Generate a P2SH Address from the redeemScript and show it
p2sh_addr = P2shAddress.from_script(redeem_script)
print(
f'\nThe P2SH Address is:\n{p2sh_addr.to_string()} Now, go on and send some funds to it.\n'
)
def main():
# always remember to setup the network
setup('testnet')
# could also instantiate from existing WIF key
priv = PrivateKey.from_wif(
'cVdte9ei2xsVjmZSPtyucG43YZgNkmKTqhwiUA8M4Fc3LdPJxPmZ')
# compressed is the default
print("\nPrivate key WIF:", priv.to_wif(compressed=True))
# get the public key
pub = priv.get_public_key()
# compressed is the default
print("Public key:", pub.to_hex(compressed=True))
# get address from public key
address = pub.get_segwit_address()
# print the address and hash - default is compressed address
print("Native Address:", address.to_string())
segwit_hash = address.to_hash()
print("Segwit Hash:", segwit_hash)
print("Segwit Version:", address.get_type())
# test to_string
addr2 = P2wpkhAddress.from_hash(segwit_hash)
print("Created P2wpkhAddress from Segwit Hash and calculate address:")
print("Native Address:", addr2.to_string())
#
# display P2SH-P2WPKH
#
# create segwit address
addr3 = PrivateKey.from_wif(
'cTmyBsxMQ3vyh4J3jCKYn2Au7AhTKvqeYuxxkinsg6Rz3BBPrYKK').get_public_key(
).get_segwit_address()
# wrap in P2SH address
addr4 = P2shAddress.from_script(addr3.to_script_pub_key())
print("P2SH(P2WPKH):", addr4.to_string())
#
# display P2WSH
#
p2wpkh_key = PrivateKey.from_wif(
'cNn8itYxAng4xR4eMtrPsrPpDpTdVNuw7Jb6kfhFYZ8DLSZBCg37')
script = Script([
'OP_1',
p2wpkh_key.get_public_key().to_hex(), 'OP_1', 'OP_CHECKMULTISIG'
])
p2wsh_addr = P2wshAddress.from_script(script)
print("P2WSH of P2PK:", p2wsh_addr.to_string())
#
# display P2SH-P2WSH
#
p2sh_p2wsh_addr = P2shAddress.from_script(p2wsh_addr.to_script_pub_key())
print("P2SH(P2WSH of P2PK):", p2sh_p2wsh_addr.to_string())
def main():
# always remember to setup the network
setup('testnet')
#
# This script creates a P2SH address containing a CHECKSEQUENCEVERIFY plus
# a P2PKH locking funds with a key as well as for 20 blocks
#
# set values
relative_blocks = 20
seq = Sequence(TYPE_RELATIVE_TIMELOCK, relative_blocks)
# secret key corresponding to the pubkey needed for the P2SH (P2PKH) transaction
p2pkh_sk = PrivateKey(
'cRvyLwCPLU88jsyj94L7iJjQX5C2f8koG4G2gevN4BeSGcEvfKe9')
# get the address (from the public key)
p2pkh_addr = p2pkh_sk.get_public_key().get_address()
# create the redeem script
redeem_script = Script([
seq.for_script(), 'OP_CHECKSEQUENCEVERIFY', 'OP_DROP', 'OP_DUP',
'OP_HASH160',
p2pkh_addr.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
])
# create a P2SH address from a redeem script
addr = P2shAddress.from_script(redeem_script)
print(addr.to_string())
def setUp(self):
setup('testnet')
# values for testing create non std tx
self.txin = TxInput("e2d08a63a540000222d6a92440436375d8b1bc89a2638dc5366833804287c83f", 1)
self.to_addr = P2pkhAddress('msXP94TBncQ9usP6oZNpGweE24biWjJs2d')
self.sk = PrivateKey('cMahea7zqjxrtgAbB7LSGbcQUr1uX1ojuat9jZodMN87JcbXMTcA')
self.txout = TxOutput( 0.9, Script(['OP_ADD', 'OP_5', 'OP_EQUAL']) )
self.change_addr = P2pkhAddress('mrCDrCybB6J1vRfbwM5hemdJz73FwDBC8r')
self.change_txout = TxOutput( 2, self.change_addr.to_script_pub_key())
self.create_non_std_tx_result = '02000000013fc8874280336836c58d63a289bcb1d87563434024a9d622020040a5638ad0e2010000006a47304402201febc032331342baaece4b88c7ab42d7148c586b9a48944cbebde95636ac7424022018f0911a4ba664ac8cc21457a58e3a1214ba92b84cb60e57f4119fe655b3a78901210279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ffffffff02804a5d05000000000393558700c2eb0b000000001976a914751e76e8199196d454941c45d1b3a323f1433bd688ac00000000'
# values for testing create non std tx
self.txin_spend = TxInput("4d9a6baf45d4b57c875fe83d5e0834568eae4b5ef6e61d13720ef6685168e663", 0)
self.txin_spend.script_sig = Script(['OP_2', 'OP_3'])
self.txout_spend = TxOutput( 0.8, self.change_addr.to_script_pub_key())
self.spend_non_std_tx_result = '020000000163e6685168f60e72131de6f65e4bae8e5634085e3de85f877cb5d445af6b9a4d00000000025253ffffffff0100b4c404000000001976a914751e76e8199196d454941c45d1b3a323f1433bd688ac00000000'
def test_send_to_non_std(self):
tx = Transaction([self.txin], [self.txout, self.change_txout])
from_addr = P2pkhAddress('mrCDrCybB6J1vRfbwM5hemdJz73FwDBC8r')
sig = self.sk.sign_input(tx, 0, from_addr.to_script_pub_key())
pk = self.sk.get_public_key().to_hex()
self.txin.script_sig = Script([sig, pk])
self.assertEqual(tx.serialize(), self.create_non_std_tx_result)
def test_signed_low_s_SIGALL_tx_1_input_2_outputs(self):
tx = Transaction([self.txin], [self.txout, self.change_low_s_txout])
sig = self.sk.sign_input(tx, 0, self.from_addr.to_script_pub_key())
pk = self.sk.get_public_key().to_hex()
self.txin.script_sig = Script([sig, pk])
self.assertEqual(tx.serialize(),
self.core_tx_signed_low_s_SIGALL_result)
def test_signed_low_s_SIGSINGLE_tx_1_input_2_outputs(self):
tx = Transaction([self.sig_txin1], [self.sig_txout1, self.sig_txout2] )
sig = self.sig_sk1.sign_input( tx, 0,
self.sig_from_addr1.to_script_pub_key(),
SIGHASH_SINGLE)
pk = self.sig_sk1.get_public_key().to_hex()
self.sig_txin1.script_sig = Script([sig, pk])
self.assertEqual(tx.serialize(), self.sig_sighash_single_result)
def main():
# always remember to setup the network
setup('testnet')
#
# This script spends from a P2SH address containing a P2PK script
#
# create transaction input from tx id of UTXO (contained 0.1 tBTC)
txin = TxInput(
'7db363d5a7fabb64ccce154e906588f1936f34481223ea8c1f2c935b0a0c945b', 0)
# secret key needed to spend P2PK that is wrapped by P2SH
p2pk_sk = PrivateKey(
'cRvyLwCPLU88jsyj94L7iJjQX5C2f8koG4G2gevN4BeSGcEvfKe9')
p2pk_pk = p2pk_sk.get_public_key().to_hex()
# create the redeem script - needed to sign the transaction
redeem_script = Script([p2pk_pk, 'OP_CHECKSIG'])
#TODELETE
#txin_script_pub_key = redeem_script.to_p2sh_script_pub_key()
to_addr = P2pkhAddress('n4bkvTyU1dVdzsrhWBqBw8fEMbHjJvtmJR')
txout = TxOutput(Decimal('0.08'), to_addr.to_script_pub_key())
# no change address - the remaining 0.01 tBTC will go to miners)
# create transaction from inputs/outputs -- default locktime is used
tx = Transaction([txin], [txout])
# print raw transaction
print("\nRaw unsigned transaction:\n" + tx.serialize())
# use the private key corresponding to the address that contains the
# UTXO we are trying to spend to create the signature for the txin -
# note that the redeem script is passed to replace the scriptSig
sig = p2pk_sk.sign_input(tx, 0, redeem_script)
#print(sig)
# set the scriptSig (unlocking script)
txin.script_sig = Script([sig, redeem_script.to_hex()])
signed_tx = tx.serialize()
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + signed_tx)
print("\nTxId:", tx.get_txid())
def test_signed_SIGALLSINGLE_ANYONEtx_2in_2_out(self):
# note that this would have failed due to absurdly high fees but we
# ignore it for our purposes
tx = Transaction([self.sig_txin1, self.sig_txin2], [self.sig_txout1, self.sig_txout2] )
sig = self.sig_sk1.sign_input(tx, 0, Script(['OP_DUP', 'OP_HASH160',
self.sig_from_addr1.to_hash160(),
'OP_EQUALVERIFY', 'OP_CHECKSIG']),
SIGHASH_ALL|SIGHASH_ANYONECANPAY)
sig2 = self.sig_sk2.sign_input(tx, 1,
self.sig_from_addr2.to_script_pub_key(),
SIGHASH_SINGLE|SIGHASH_ANYONECANPAY)
pk = self.sig_sk1.get_public_key().to_hex()
pk2 = self.sig_sk2.get_public_key().to_hex()
self.sig_txin1.script_sig = Script([sig, pk])
self.sig_txin2.script_sig = Script([sig2, pk2])
self.assertEqual(tx.serialize(),
self.sign_sighash_all_single_anyone_2in_2out_result)
def main():
# always remember to setup the network
setup('testnet')
# the key that corresponds to the P2WPKH address
priv = PrivateKey("cVdte9ei2xsVjmZSPtyucG43YZgNkmKTqhwiUA8M4Fc3LdPJxPmZ")
pub = priv.get_public_key()
fromAddress = pub.get_segwit_address()
print(fromAddress.to_string())
# amount is needed to sign the segwit input
fromAddressAmount = to_satoshis(0.01)
# UTXO of fromAddress
txid = '13d2d30eca974e8fa5da11b9608fa36905a22215e8df895e767fc903889367ff'
vout = 0
toAddress = P2pkhAddress('mrrKUpJnAjvQntPgz2Z4kkyr1gbtHmQv28')
# create transaction input from tx id of UTXO
txin = TxInput(txid, vout)
# the script code required for signing for p2wpkh is the same as p2pkh
script_code = Script([
'OP_DUP', 'OP_HASH160',
pub.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG'
])
# create transaction output
txOut = TxOutput(to_satoshis(0.009), toAddress.to_script_pub_key())
# create transaction without change output - if at least a single input is
# segwit we need to set has_segwit=True
tx = Transaction([txin], [txOut], has_segwit=True)
print("\nRaw transaction:\n" + tx.serialize())
sig = priv.sign_segwit_input(tx, 0, script_code, fromAddressAmount)
tx.witnesses.append(Script([sig, pub.to_hex()]))
# print raw signed transaction ready to be broadcasted
print("\nRaw signed transaction:\n" + tx.serialize())
print("\nTxId:", tx.get_txid())
def test_p2wsh_creation_1multisig(self):
p2wpkh_key = PrivateKey.from_wif(
'cNn8itYxAng4xR4eMtrPsrPpDpTdVNuw7Jb6kfhFYZ8DLSZBCg37')
script = Script([
'OP_1',
p2wpkh_key.get_public_key().to_hex(), 'OP_1', 'OP_CHECKMULTISIG'
])
p2wsh_addr = P2wshAddress.from_script(script)
self.assertTrue(p2wsh_addr.to_string(), self.correct_p2wsh_address)
